Grate for sintering pans



March 5, 1929. T. M. ALl-:xovlTs' I 1,704,027

GRATE FOR SINTERING FANS Filed Feb. 25, 1928 4 Sheets-Sheet 2 3 f7 [l j L c I Y M 77:;-

March 5, 1929. T, M ALExovn-s v 1,704,027

GRATEzFOR SINTERING FANS Filed Feb. 25, 1928 4 sheets-sheet 3 patented Mar. 5, 1,9292

I'riso STATES PATENT oFFlcE.. l

'rrroivras'ivrrcnann ALn'XoviTs, or BAYONNE, NEW tanrtsnv, AssraNon To JOHN E.

' v i eannNAwAL'r, or Nnw YORK, N. Y.

@RATE .FOR SINTERING. FANS.

llhe present invention has relation to improvements in Agratos for sintering pans and consists in the novel ,features ot construction more fully set i'orth in the speciieation and pointed out in the claims.

The grate orming the subject of the present application is a specific improvement over that described in the copending application of John E. Greenawalt, Serial No. 175,815, liled March 16, 1927, and is Application filed February 25, 1928. Serial No. 257,089.

sintering pan showing one complete section '55' ot' the grate; Fig. 2 1s a vertical cross-section through the pan taken on the line 2-2 of Fig. 1; Fig. 3 is a cross section similar` to Fig. 2 taken'on/Z the line 8-3 of Fig.. 1

to show the construction of the bars in the 6o row adjacent to the row of ,barsV shown in Fig. 2; Fig. 4 is a vertical longitudinal section taken on the line 4 4 ot Fig. 1; Fig. 5 is a cross section taken on the same line as Fig. 3 except that thesintering pan e5 is tilted or rotated for dumping; Fig.. 6

1s across section taken on the line 6-6 of Fig. 1 to show the row of immovable or` partition bars; Fig. -7 is a section similar to that ot Fig. 4 but on an enlarged scale how- 'In similarly adapted for use in sintering pans or similar apparatus for the metallurgical treatment ot ores, from which the treated material is discharged or dumped by rotating or tilting the pan. While the grate may be advantageously used .in connection fshearing action, any material that may have with apparatus other than sintering apparatus, l will confine myself in the present description to its use in sintering pans because the grate is adapted to assist the discharge of the pan, and particularly, by virtue of a relative movement between the bars i constituting the grate, to clean itself.

ln the application above referred tosome of the grate bars were rotatable while others were moved bodily away from the normal supporting plane ot the grate. ln the present application all of the bars except the partition bars, are moved bodily away from said normal supporting plane.

rl`he principal object oi.z the invention 1s' to impart a positive movement to the grate bars for the purpose of dislodging, by a become fused to the bars or lodged in the openings, by means of. a comparatively simple structure. Obviously, the nature ot the apparatus is such that the grate could ynot consistently operate if complicated, or

it it involved delicate parts, andl have,

therefore, sought in the present 'invention ever; Figs. 8, k9, and 10 are respectively top plan, side elevation, and end views of one of the end movable grate bars; Figs. 11 and A12 are respectively top plan and side elevation ot a grate bar supporting trame;

Fig. 13 is a side elevation of one of the bearings in which ,the rocking grate bar frames are mounted; Figs. 14 15, and 16 are respectively top plan, side elevation and end views of one ot the intermediate mov- 8o able gra-tebars; Figs. 17 and 18 are respectively top plan and side elevation of one yof the short mvable end grate bars; Fig. 19 is a cross section through the lastv mentioned bar taken on the line 19-19 of as Fig. 18; Figs. 20 and 21- are .respectively top planand side elevation of one of the stationary partition bars; Fig. 22 is a side view of a fragment of thetendV dead plate,

and Fig. 23 is a fragmentary detail showing 9o a modified form of bar weight `t'or actu;- atin the grate bar frames.

Referring to the drawings, P representsf a sintering pan adapted to be rotated on its trunnions, only one ot whichl is shown and indicated by the numeral 1, said trunnions being mounted on roller bearings 2. The specific mechanism for rotating the pan forms no part ot the subject of the present invention and need notv be further described.y

Formed integrally with 'the sintering pan andeggtending from onel side wall 3 to the other are a series oi. ribs' 4 spaced from beams 5 to which the ribs are connected through' the perpendicular struts 6. The rib. 4 is provided with a flan e 7 connected in spaced relation to the rib y means of a web 8. It will be underv reinforcing (see Figs. 4 and 7). At each end of the pan (although one end only is shown) is a dead plate 9 bolted to end wall 10 by a bolt 11, said dead plate having a plurality of dependent bearings 12 (as shown in Fig. 22).

A plurality of bearing blocks 13 are mounted in spaced relation on flange 4 to which each bloclr is secured by a stud 14, each of said blocks being bifurcated and provided with oppositely disposed lateral lugs `15, 15 (Fig. 13). Both forks 16,16 of block 13 are provided with alining openings 17, 17, said openings also being in line with' opening 18 in the opposite bearing 12 on the dead plate 9 and agrate bar frame 19 is pivotally mounted in oppositely disposed bearings 12 and 13 by means of pins 20, 21, the former traversing opening 18 in bearing 12 and the latter traversing openings 17, 17 in bearing 13. The ends 22, 22 of frame 19 are provided with openings 23, 23

to receive pins 20 and 21, said openings being of the size to permit the frame 19 to rock freely on pins 2O and 21. Fin 21 extends beyond both sides of bearing 13, so that it may support the contiguous ends of adjaf centfframes 19, 19. A lever arm 24 projects downwardly from the sides 25, 25 of each frame 19 and has its lower end 26 adapted for operation in the upwardly flaring slot 27 traversing a bar weight 28 slidably mounted in raceways or guides 29, 29 secured to bottom plate 30 of the sinteringl pan. rFhere is, of course, a slot 27 to receive each one of the dependent ends 26 of each rocking frame 19.

Referring to Fig. 2, it will be observed that the rowof grate bars comprises from left to righta long terminal bar 31 anda plurality of intermediate bars 32, 32 etc., and a short terminal bar 33. Terminal bar 31 has. its outer end 31 disposed in a recess 34 'formed between the bottom. of a side dead plate 35 and a flange 36 projecting from a confining plate 37'. rlhe dead plate 35 is secured to the side wall 3 of the pan by bolts 39, and confining plate 37 is secured to saidlpan wall by bolts 40. The inner end of bar 31 is provided with'a recess or notch 41 to receive the cooperating end 42 of barmoana? on the right hand Harige 46 projecting outwardly from side 25 of frame 19, and both ledge 43 and flange 46 are received in recess 47 formed between the end 42 of bar 32 and depending flange48 spaced therefrom. Corresponding ends of succeeding bars 32 are similarly formed so that each bar in the row has cooperative engagement with that bar immediately adjacent, and the right hand end of bar 31 and each bar 32 are supported directly by flanges 46, and the left hand ends of bars 32 and 33 are supported by the ledge 43 of the adjacent bar. rllhe depending flanges 48 of the bars, as we shall see later, prevent the bars from fallin out of the pan when the grate is inverte for dumping. rlhe marginal bar 33 has a recess 49 corresponding with recesses 47 of the other bars, and a flange 50 'corresponding with flange 48 of the other bars, but the bottom face 51 of recess 49 is somewhat inclined to provide sufiicient clearance for the flange 46 reposing in the recess when the frame 19 is rocked. rlhis additional clearance is necessary because bar 33 has its outer end-52 confined between dead plate 35 and confining plate 37 and of necessity tilts upwardly when the right hand frame 19 is rocked. Bar 31 also tilts upwardly but the arc of' rotation of bar 32 is approximately half the length of the arc of rotation of bar 31.

By referring to Fig. 3 it will be observed that the bars 31, 32 etc., and 33 in the row adjacent to those shown in Fig. 2, are reversed with respect to the position of the corresponding bars in Fig. 2. Consequently when the .pan F is rotated in dumping position and the frames 19 rocked, the bars shown in Fig. 3 will be depressed while those shown in Fi 2 will be elevated. rl`his must be so since t e bars in Fig. 3 are supported on the descending side of frame 19 while `the bars shown in Fig. 2 are supported on the ascending side of frame 19. The respective movement of the bars when the pan is tilted is clearl shown in Fig. 5 where the frames 19 have een rocked by movement of the bar weight 28. When the pan F has been Acompletely inverted, the bars are held in place by the flanges 48. i

` Referring now'to Fig. 6, it will be seen that the end bars 53 and 54 have their outer ends confined between dead plates 35, 35 and confining plates 37, 37 respectively, while their inner ends are in cooperative engagement with the adjacent ends of intermediate bars 55, each intermediate bar 55 having a projecting flange 56 Vat its left hand end, adjacent to which is a depending lug 57. At the right hand end of each bar 55 1s a recess 58 formed between the projecting end 59 and flange 60, and recess 61 between flange 60 and a depending flange 62. The function of recess 58eis to receive the end 56 of the adjacent bar, and the function of recess 6.1- is coV to receive the lug 15 projecting from bearing 13. It `Will be observed that the lug 57 forms with fiange 6l) of the next adjacent bar a recess 63 toA receive pin 21. Thus, the bars 53, 511 and 55 are all securely held in place, the end bars by dead plates 35, 35 and confiningplates 37, 37', andthe intermediate bars by the flanges received in recesses 61. j

All of the bars except the several rows of partition bars 53, 54 and 55, just described, are supported on side langes 46, 46 of frame 19 and as these frames 19 are rocked, the bars must either rise or fall, depending on which side of t-he frame they repose. all of the intermediate bars 32 rise or fall bodily, the marginal bars, as shown in Fig. 5, will tilt either upwardly or downwardly since their outer ends have tiltable confinement.

rovided with bosses a, a, a on their side aces for the purpose of maintaining the bars in spaced relation and the slots s' between adjacent bars a definite width.

ln Fig. 23 l show a modification .of the' grate bar actuating means comprising a bar weight 65 slidable in the guides 66 (of which ot' guide 66 when the bar 65 is in itsnormal j position. rlhe boss 68 has an inclined face 71 which 7engages inclined face 72 on the has been rotated to a detinite predetermined position whenits weight will overcome the resistance ofithe engaging faces 69 and 70 and cause the weight to move with considerable force to more effectively break up and dislodge any material that may`clog the spaces' between the grate bars.

Having described my invention, 1 claim:

l. grate comprising a supporting member, a plurality of grate bars mounted on said members, and means for moving soine' of the bars in one direction and other bars in an oppositedirection. i

2. grate comprising a supporting member, a plurality of grate bars supported by said member, said bars lying normally in a common plane, and means for actuating the bars to dump the grate, said means operating to move some of the ybars in one direction from the normal `plane and other bars in an opposite direction from said plane. 3. A grate comprising a supporting member, a plurality of grate bars mounted in While Each` of the bars 3l, 32 and 33 is juxtapositionv on said member, and .means for actuating said member to elevate some of the bars and depress other bars.

4. A grate comprising a supporting member, a plurality ofvjuxtaposed grate bars arranged to be movably held by said supporting member, and' means for rocking said member to move alternate bars in opposite'y bars extendin across and movably supported by two a jacent frames, and means for simultaneously rocking said frames to depress alternate grate bars and elevate the other bars. v

7. A grate comprising a series of supporting trames, a plurality of juxtaposed grate bars extending across and movably supported by two adjacent frames, and means for simultaneously rocking i said frames to move alternate grate bars to opposite sides of the normal grate supporting plane.

8. A posed frames, a plurality of grate bars each of which is adapted to be supported by corresponding sides of adjacent bars, and means @or rocking said frames on an axis transverse to the plane of the bars, whereupon some of Ythe bars will be raised and others lowered.

9. lln an apparatus for treating ores comj prising a holder, a grate disposed within said holder, said grate comprising a series'olof juxtaposed supporting frames, a plurality of grate bars movably fixed to said frames to provide a support for the ore, and means for imparting rotation to the frames with,

a dumping movement of the holder, said rotation of the frames operating to move the bars to opposite sides of the normal grate supporting surface.

grate comprising a series of juxta- 10. In an a paratus for treating' ores comprising a hol er, a grate disposed within said holder, said grate comprising a nseries of juxtaposed supporting frames, a plurality of juxtaposed grate bars, each bar extending from the side of one frame to a corresponding side of the next adjacent frame, sultable formations`on-the ends/ef the bars for co- `Loperating with the frames to hold the b ars in place, and means for imparting rotatlon" rections with] respect to the normal grate/ j supporting surface.

moana? actuating means until the holder has been 1'5 rotated to a predetermined position.`

13. ln combination with a holder for treating material, a grate mounted therein,

said grate comprising a plurality of movable grate bars, actuating means for moving 20 the bars with the rotation of the pan, and means 'for holding said actuating means inoperative until the pan has been rotated to a predetermined position.

ln testimony whereof l hereunto afHX my 25 signature.

THOMAS MICHAEL ALEXOVXTS. 

